Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f4802ad3b5c8852212d8937c73922aaba4fe3678afd6d68899a8d96297bd53e' 
  AND token = 'HFCOdNo3gkYv9rhdV/3DBAf6ex11rdrMlNonm17BJqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}